NPSM240 Series Instruction Manual
SI000013A02_I.S.NPSM240.doc
www.nextys.com
Page 3/5
USER INSTRUCTIONS
1) Description:
DIN rail mountable primary switched-mode power supply with 90...132Vac if the Input Voltage Selector is set on
120V
and 187…264Vac if the Input Voltage
Selector is set on
240V
; 270…345Vdc input (UL not evaluated) if the Input Voltage Selector is set on
240V
, suitable for single phase main line and DC line.
2) Installation:
use DIN-rails according to EN60715. Installation should be made vertically (see Fig.4). For better device stability fix the rail to the wall close to the point where
the device is to be mounted. In order to guarantee sufficient convection, we recommend observing a minimum distance to other modules (see Fig.3).
The device is provided with a thermal protection; a limited air flow can cause the thermal protection tripping.
The SMPS automatically restarts after cooling. To get normal operation reduce the temperature of the air surrounding the power supply, increase the ventilation or reduce the
load (see Fig.8).
3) Connections
: the device is equipped with pluggable screw terminals. To avoid sparks, do not connect or disconnect the connectors before having previously turned-off input
power and waited for internal capacitors discharge (minimum 1 minute).
In order to comply with UL certification, use appropriate copper cables of indicated cross section, designed for an operating temperatures of:
60°C for ambient up to 45°C
75°C for ambient up to 60°C
90°C for ambient up to 70°C
Strip the connecting ends of the wires according to the indication and ensure that all strands of a stranded wire enter the terminal connection (see Fig.5).
4) Input protection:
the device input is provided with varistors against overvoltage. Input is provided with internal fuses 6.3AT/250Vac, thus an external short circuit/overcurrent
protection must be provided by the end user (see Fig.6).
For operation on a single phase system, a protection fuse on the phase must be provided.
Surge protection:
it is strongly recommended to provide external surge arresters (SPD) according to local regulations.
5) AC input connection:
the device can be connected to single phase AC lines with Uin 120Vac or 240Vac (see Fig.7). Ensure that the PE conductor is properly connected.
Please connect first the PE.
Need attention, set correctly the Input Voltage Selector based on the input voltage used.
Input data (UL certified):
UL508
UL61010
Input AC rated voltage
~120 / 240Vac
~120 / 240Vac
Input AC rated current
4 - 2A
4 - 2A
Mains frequency
50 - 60Hz
50 - 60Hz
6) DC input connection:
connect L terminal to (+) positive pole, N terminal to (-) negative pole and
terminal to GND. Rated voltage 270...345Vdc (UL not evaluated).
Need attention, set correctly the Input Voltage Selector on 240V when it use in DC.
The device is also suitable for photovoltaic or wind turbine applications (see Fig.7).
7) Output connection:
the device is suitable for
SELV
and
PELV
circuitry. Pay attention NPSM240-72P is not
SELV
.
Uout can be adjusted with a potentiometer to a wide range (see Fig.1).
Check Uout before connecting the power supply to the load. With output voltage set to the max. value, the continuous [current x voltage] must not exceed the nominal power.
If the output current exceed 15A the load must be wired to the power supply using all the four poles of the output connector.
8) Parallel connection and redundancy:
power supplies can be connected in parallel to increase power.
Uout must be set uniformly (±100mV) on each power supply and the wiring must be symmetrical to ensure an equal current distribution.
Models with
“P”
suffix have an integrated ORing circuit.
For redundant connection, use the Models
“P”
or an external isolating device must be used (see accessory device).
9) Output protection:
the device is protected against overload (OL) / short circuit (SC) / overvoltage (OV) / overtemperature (OT).
OL and SC:
are controlled by a hiccup mode auto-reset protection with the following behaviour:
OL behaviour:
Max. OL = In x 1.3 with constant output voltage. If the current is
≥
In x 1.3 the unit enters the OL protection and starts an ON/OFF cycle (hiccup mode).
SC behaviour:
the device supplies the indicated short circuit peak current for 140ms if the output current exceeds In x 1.3 the device enters into a controlled ON/OFF cycles
(hiccup mode). The output voltage drops to a voltage value depending on the impedance of the failed load circuit.
Output OV circuit protection
: the output is protected against potential OV due to internal malfunction or coming from the load for Uout
≥
Unom x 1.2 – 1.3, depending on the
model.
OT protection:
turns off the device if the internal temperature exceeds a safe limit.
The device restarts automatically after cooling down. To recover to normal operation reduce air temperature surrounding the power supply, increase cooling or reduce load
(see Fig.8).
10) Feeding DC motors:
it is possible to feed DC motors considering that when a motor starts-up under effort its consumption is much higher than the nominal current and it
can trigger overcurrent protection (see accessory device).
NOTE:
motors can generate high conducted noise on the DC line. Therefore it is not recommended to feed on the same line motors and equipment sensitive to noise.
11) Operation with Battery:
when a battery is connected in parallel to the Output for backup purposes (see accessory device).
12) Environmental:
these products are IP20 (according to IEC 60529), and therefore chemicals/solvents, cleaning agents and other liquids must not be used.
13) Environment:
these power supplies are SMPS for use in applications within a Pollution Degree 2, overvoltage category II environment (overvoltage category III according
to EN50178). Do not use in wet area or subject to moisture. These products are designed for indoor use only.
